/* return non zero if error */
static int udp_open(URLContext *h, const char *uri, int flags)
{
char hostname[1024];
int port, udp_fd = -1, tmp, bind_ret = -1;
UDPContext *s = NULL;
int is_output;
const char *p;
char buf[256];
#if !CONFIG_IPV6
struct sockaddr_in my_addr;
#else
struct sockaddr_storage my_addr;
#endif
int len;
h->is_streamed = 1;
h->max_packet_size = 1472;
is_output = (flags & URL_WRONLY);
if(!ff_network_init())
return AVERROR(EIO);
s = av_mallocz(sizeof(UDPContext));
if (!s)
return AVERROR(ENOMEM);
h->priv_data = s;
s->ttl = 16;
s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
p = strchr(uri, '?');
if (p) {
s->reuse_socket = find_info_tag(buf, sizeof(buf), "reuse", p);
if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
s->ttl = strtol(buf, NULL, 10);
}
if (find_info_tag(buf, sizeof(buf), "localport", p)) {
s->local_port = strtol(buf, NULL, 10);
}
if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
h->max_packet_size = strtol(buf, NULL, 10);
}
if (find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
s->buffer_size = strtol(buf, NULL, 10);
}
}
/* fill the dest addr */
url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
/* XXX: fix url_split */
if (hostname[0] == '\0' || hostname[0] == '?') {
/* only accepts null hostname if input */
if (flags & URL_WRONLY)
goto fail;
} else {
udp_set_remote_url(h, uri);
}
if (s->is_multicast && !(h->flags & URL_WRONLY))
s->local_port = port;
udp_fd = udp_socket_create(s, &my_addr, &len);
if (udp_fd < 0)
goto fail;
if (s->reuse_socket)
if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
goto fail;
/* the bind is needed to give a port to the socket now */
/* if multicast, try the multicast address bind first */
if (s->is_multicast && !(h->flags & URL_WRONLY)) {
bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
}
/* bind to the local address if not multicast or if the multicast
* bind failed */
if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0)
goto fail;
len = sizeof(my_addr);
getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
s->local_port = udp_port(&my_addr, len);
if (s->is_multicast) {
if (h->flags & URL_WRONLY) {
/* output */
if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
goto fail;
} else {
/* input */
if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0)
goto fail;
}
}
if (is_output) {
/* limit the tx buf size to limit latency */
tmp = s->buffer_size;
if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
av_log(NULL, AV_LOG_ERROR, "setsockopt(SO_SNDBUF): %s\n", strerror(errno));
goto fail;
}
} else {
/* set udp recv buffer size to the largest possible udp packet size to
* avoid losing data on OSes that set this too low by default. */
tmp = s->buffer_size;
if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
av_log(NULL, AV_LOG_WARNING, "setsockopt(SO_RECVBUF): %s\n", strerror(errno));
}
/* make the socket non-blocking */
ff_socket_nonblock(udp_fd, 1);
}
s->udp_fd = udp_fd;
return 0;
fail:
if (udp_fd >= 0)
closesocket(udp_fd);
av_free(s);
return AVERROR(EIO);
}
/* return non zero if error */
static int udp_open(URLContext *h, const char *uri, int flags)
{
char hostname[1024], localaddr[1024] = "";
int port, udp_fd = -1, tmp, bind_ret = -1, dscp = -1;
UDPContext *s = h->priv_data;
int is_output;
const char *p;
char buf[256];
struct sockaddr_storage my_addr;
socklen_t len;
int i, num_include_sources = 0, num_exclude_sources = 0;
char *include_sources[32], *exclude_sources[32];
h->is_streamed = 1;
is_output = !(flags & AVIO_FLAG_READ);
if (s->buffer_size < 0)
s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
if (s->sources) {
if (parse_source_list(s->sources, include_sources,
&num_include_sources,
FF_ARRAY_ELEMS(include_sources)))
goto fail;
}
if (s->block) {
if (parse_source_list(s->block, exclude_sources, &num_exclude_sources,
FF_ARRAY_ELEMS(exclude_sources)))
goto fail;
}
if (s->pkt_size > 0)
h->max_packet_size = s->pkt_size;
p = strchr(uri, '?');
if (p) {
if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
char *endptr = NULL;
s->reuse_socket = strtol(buf, &endptr, 10);
/* assume if no digits were found it is a request to enable it */
if (buf == endptr)
s->reuse_socket = 1;
}
if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) {
char *endptr = NULL;
s->overrun_nonfatal = strtol(buf, &endptr, 10);
/* assume if no digits were found it is a request to enable it */
if (buf == endptr)
s->overrun_nonfatal = 1;
if (!HAVE_PTHREAD_CANCEL)
av_log(h, AV_LOG_WARNING,
"'overrun_nonfatal' option was set but it is not supported "
"on this build (pthread support is required)\n");
}
if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
s->ttl = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "udplite_coverage", p)) {
s->udplite_coverage = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "localport", p)) {
s->local_port = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
s->pkt_size = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
s->buffer_size = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
s->is_connected = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) {
dscp = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) {
s->circular_buffer_size = strtol(buf, NULL, 10);
if (!HAVE_PTHREAD_CANCEL)
av_log(h, AV_LOG_WARNING,
"'circular_buffer_size' option was set but it is not supported "
"on this build (pthread support is required)\n");
}
if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) {
av_strlcpy(localaddr, buf, sizeof(localaddr));
}
if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
if (parse_source_list(buf, include_sources, &num_include_sources,
FF_ARRAY_ELEMS(include_sources)))
goto fail;
}
if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
if (parse_source_list(buf, exclude_sources, &num_exclude_sources,
FF_ARRAY_ELEMS(exclude_sources)))
goto fail;
}
if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p))
s->timeout = strtol(buf, NULL, 10);
if (is_output && av_find_info_tag(buf, sizeof(buf), "broadcast", p))
s->is_broadcast = strtol(buf, NULL, 10);
}
/* handling needed to support options picking from both AVOption and URL */
s->circular_buffer_size *= 188;
if (flags & AVIO_FLAG_WRITE) {
h->max_packet_size = s->pkt_size;
} else {
h->max_packet_size = UDP_MAX_PKT_SIZE;
}
h->rw_timeout = s->timeout;
/* fill the dest addr */
av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
/* XXX: fix av_url_split */
if (hostname[0] == '\0' || hostname[0] == '?') {
/* only accepts null hostname if input */
if (!(flags & AVIO_FLAG_READ))
goto fail;
} else {
if (ff_udp_set_remote_url(h, uri) < 0)
goto fail;
}
if ((s->is_multicast || s->local_port <= 0) && (h->flags & AVIO_FLAG_READ))
s->local_port = port;
if (localaddr[0])
udp_fd = udp_socket_create(s, &my_addr, &len, localaddr);
else
udp_fd = udp_socket_create(s, &my_addr, &len, s->localaddr);
if (udp_fd < 0)
goto fail;
s->local_addr_storage=my_addr; //store for future multicast join
/* Follow the requested reuse option, unless it's multicast in which
* case enable reuse unless explicitly disabled.
*/
if (s->reuse_socket > 0 || (s->is_multicast && s->reuse_socket < 0)) {
s->reuse_socket = 1;
if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
goto fail;
}
if (s->is_broadcast) {
#ifdef SO_BROADCAST
if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0)
#endif
goto fail;
}
/* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving.
* The receiver coverage has to be less than or equal to the sender coverage.
* Otherwise, the receiver will drop all packets.
*/
if (s->udplite_coverage) {
if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
av_log(h, AV_LOG_WARNING, "socket option UDPLITE_SEND_CSCOV not available");
if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
av_log(h, AV_LOG_WARNING, "socket option UDPLITE_RECV_CSCOV not available");
}
if (dscp >= 0) {
dscp <<= 2;
if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0)
goto fail;
}
/* If multicast, try binding the multicast address first, to avoid
* receiving UDP packets from other sources aimed at the same UDP
* port. This fails on windows. This makes sending to the same address
* using sendto() fail, so only do it if we're opened in read-only mode. */
if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) {
bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
}
/* bind to the local address if not multicast or if the multicast
* bind failed */
/* the bind is needed to give a port to the socket now */
if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
log_net_error(h, AV_LOG_ERROR, "bind failed");
goto fail;
}
len = sizeof(my_addr);
getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
s->local_port = udp_port(&my_addr, len);
if (s->is_multicast) {
if (h->flags & AVIO_FLAG_WRITE) {
/* output */
if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
goto fail;
}
if (h->flags & AVIO_FLAG_READ) {
/* input */
if (num_include_sources && num_exclude_sources) {
av_log(h, AV_LOG_ERROR, "Simultaneously including and excluding multicast sources is not supported\n");
goto fail;
}
if (num_include_sources) {
if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, include_sources, num_include_sources, 1) < 0)
goto fail;
} else {
if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage) < 0)
goto fail;
}
if (num_exclude_sources) {
if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, exclude_sources, num_exclude_sources, 0) < 0)
goto fail;
}
}
}
if (is_output) {
/* limit the tx buf size to limit latency */
tmp = s->buffer_size;
if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
goto fail;
}
} else {
/* set udp recv buffer size to the requested value (default 64K) */
tmp = s->buffer_size;
if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)");
}
len = sizeof(tmp);
if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) {
log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)");
} else {
av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp);
if(tmp < s->buffer_size)
av_log(h, AV_LOG_WARNING, "attempted to set receive buffer to size %d but it only ended up set as %d", s->buffer_size, tmp);
}
/* make the socket non-blocking */
ff_socket_nonblock(udp_fd, 1);
}
if (s->is_connected) {
if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
log_net_error(h, AV_LOG_ERROR, "connect");
goto fail;
}
}
for (i = 0; i < num_include_sources; i++)
av_freep(&include_sources[i]);
for (i = 0; i < num_exclude_sources; i++)
av_freep(&exclude_sources[i]);
s->udp_fd = udp_fd;
#if HAVE_PTHREAD_CANCEL
if (!is_output && s->circular_buffer_size) {
int ret;
/* start the task going */
s->fifo = av_fifo_alloc(s->circular_buffer_size);
ret = pthread_mutex_init(&s->mutex, NULL);
if (ret != 0) {
av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret));
goto fail;
}
ret = pthread_cond_init(&s->cond, NULL);
if (ret != 0) {
av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret));
goto cond_fail;
}
ret = pthread_create(&s->circular_buffer_thread, NULL, circular_buffer_task, h);
if (ret != 0) {
av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret));
goto thread_fail;
}
s->thread_started = 1;
}
#endif
return 0;
#if HAVE_PTHREAD_CANCEL
thread_fail:
pthread_cond_destroy(&s->cond);
cond_fail:
pthread_mutex_destroy(&s->mutex);
#endif
fail:
if (udp_fd >= 0)
closesocket(udp_fd);
av_fifo_freep(&s->fifo);
for (i = 0; i < num_include_sources; i++)
av_freep(&include_sources[i]);
for (i = 0; i < num_exclude_sources; i++)
av_freep(&exclude_sources[i]);
return AVERROR(EIO);
}
/* return non zero if error */
static int udp_open(URLContext *h, const char *uri, int flags)
{
char hostname[1024];
int port, udp_fd = -1, tmp, bind_ret = -1;
UDPContext *s = NULL;
int is_output;
const char *p;
char buf[256];
struct sockaddr_storage my_addr;
int len;
int reuse_specified = 0;
h->is_streamed = 1;
h->max_packet_size = 1472;
is_output = !(flags & AVIO_FLAG_READ);
s = av_mallocz(sizeof(UDPContext));
if (!s)
return AVERROR(ENOMEM);
h->priv_data = s;
s->ttl = 16;
s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
s->circular_buffer_size = 7*188*4096;
p = strchr(uri, '?');
if (p) {
if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
char *endptr=NULL;
s->reuse_socket = strtol(buf, &endptr, 10);
/* assume if no digits were found it is a request to enable it */
if (buf == endptr)
s->reuse_socket = 1;
reuse_specified = 1;
}
if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
s->ttl = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "localport", p)) {
s->local_port = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
h->max_packet_size = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
s->buffer_size = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
s->is_connected = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "buf_size", p)) {
s->circular_buffer_size = strtol(buf, NULL, 10)*188;
}
}
/* fill the dest addr */
av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
/* XXX: fix av_url_split */
if (hostname[0] == '\0' || hostname[0] == '?') {
/* only accepts null hostname if input */
if (!(flags & AVIO_FLAG_READ))
goto fail;
} else {
if (ff_udp_set_remote_url(h, uri) < 0)
goto fail;
}
if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
s->local_port = port;
udp_fd = udp_socket_create(s, &my_addr, &len);
if (udp_fd < 0)
goto fail;
/* Follow the requested reuse option, unless it's multicast in which
* case enable reuse unless explicitely disabled.
*/
if (s->reuse_socket || (s->is_multicast && !reuse_specified)) {
s->reuse_socket = 1;
if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
goto fail;
}
/* the bind is needed to give a port to the socket now */
/* if multicast, try the multicast address bind first */
if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) {
bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
}
/* bind to the local address if not multicast or if the multicast
* bind failed */
if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0)
goto fail;
len = sizeof(my_addr);
getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
s->local_port = udp_port(&my_addr, len);
if (s->is_multicast) {
if (!(h->flags & AVIO_FLAG_READ)) {
/* output */
if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
goto fail;
} else {
/* input */
if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0)
goto fail;
}
}
if (is_output) {
/* limit the tx buf size to limit latency */
tmp = s->buffer_size;
if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
av_log(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF): %s\n", strerror(errno));
goto fail;
}
} else {
/* set udp recv buffer size to the largest possible udp packet size to
* avoid losing data on OSes that set this too low by default. */
tmp = s->buffer_size;
if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
av_log(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF): %s\n", strerror(errno));
}
/* make the socket non-blocking */
ff_socket_nonblock(udp_fd, 1);
}
if (s->is_connected) {
if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
av_log(h, AV_LOG_ERROR, "connect: %s\n", strerror(errno));
goto fail;
}
}
s->udp_fd = udp_fd;
#if 0 && HAVE_PTHREADS
if (!is_output && s->circular_buffer_size) {
/* start the task going */
s->fifo = av_fifo_alloc(s->circular_buffer_size);
if (pthread_create(&s->circular_buffer_thread, NULL, circular_buffer_task, h)) {
av_log(h, AV_LOG_ERROR, "pthread_create failed\n");
goto fail;
}
}
#endif
return 0;
fail:
if (udp_fd >= 0)
closesocket(udp_fd);
av_fifo_free(s->fifo);
av_free(s);
return AVERROR(EIO);
}
/* return non zero if error */
static int udp_open(URLContext *h, const char *uri, int flags)
{
char hostname[1024], localaddr[1024] = "";
int port, udp_fd = -1, tmp, bind_ret = -1;
UDPContext *s = h->priv_data;
int is_output;
const char *p;
char buf[256];
struct sockaddr_storage my_addr;
socklen_t len;
int reuse_specified = 0;
int i, num_include_sources = 0, num_exclude_sources = 0;
char *include_sources[32], *exclude_sources[32];
h->is_streamed = 1;
h->max_packet_size = 1472;
is_output = !(flags & AVIO_FLAG_READ);
s->ttl = 16;
s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
p = strchr(uri, '?');
if (p) {
if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
char *endptr = NULL;
s->reuse_socket = strtol(buf, &endptr, 10);
/* assume if no digits were found it is a request to enable it */
if (buf == endptr)
s->reuse_socket = 1;
reuse_specified = 1;
}
if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
s->ttl = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "localport", p)) {
s->local_port = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
h->max_packet_size = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
s->buffer_size = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
s->is_connected = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) {
av_strlcpy(localaddr, buf, sizeof(localaddr));
}
if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
if (parse_source_list(buf, include_sources, &num_include_sources,
FF_ARRAY_ELEMS(include_sources)))
goto fail;
}
if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
if (parse_source_list(buf, exclude_sources, &num_exclude_sources,
FF_ARRAY_ELEMS(exclude_sources)))
goto fail;
}
}
/* fill the dest addr */
av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
/* XXX: fix av_url_split */
if (hostname[0] == '\0' || hostname[0] == '?') {
/* only accepts null hostname if input */
if (!(flags & AVIO_FLAG_READ))
goto fail;
} else {
if (ff_udp_set_remote_url(h, uri) < 0)
goto fail;
}
if ((s->is_multicast || !s->local_port) && (h->flags & AVIO_FLAG_READ))
s->local_port = port;
udp_fd = udp_socket_create(s, &my_addr, &len, localaddr);
if (udp_fd < 0)
goto fail;
/* Follow the requested reuse option, unless it's multicast in which
* case enable reuse unless explicitly disabled.
*/
if (s->reuse_socket || (s->is_multicast && !reuse_specified)) {
s->reuse_socket = 1;
if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
goto fail;
}
/* If multicast, try binding the multicast address first, to avoid
* receiving UDP packets from other sources aimed at the same UDP
* port. This fails on windows. This makes sending to the same address
* using sendto() fail, so only do it if we're opened in read-only mode. */
if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) {
bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
}
/* bind to the local address if not multicast or if the multicast
* bind failed */
/* the bind is needed to give a port to the socket now */
if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
log_net_error(h, AV_LOG_ERROR, "bind failed");
goto fail;
}
len = sizeof(my_addr);
getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
s->local_port = udp_port(&my_addr, len);
if (s->is_multicast) {
if (h->flags & AVIO_FLAG_WRITE) {
/* output */
if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
goto fail;
}
if (h->flags & AVIO_FLAG_READ) {
/* input */
if (num_include_sources && num_exclude_sources) {
av_log(h, AV_LOG_ERROR, "Simultaneously including and excluding multicast sources is not supported\n");
goto fail;
}
if (num_include_sources) {
if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, include_sources, num_include_sources, 1) < 0)
goto fail;
} else {
if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0)
goto fail;
}
if (num_exclude_sources) {
if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, exclude_sources, num_exclude_sources, 0) < 0)
goto fail;
}
}
}
if (is_output) {
/* limit the tx buf size to limit latency */
tmp = s->buffer_size;
if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
goto fail;
}
} else {
/* set udp recv buffer size to the largest possible udp packet size to
* avoid losing data on OSes that set this too low by default. */
tmp = s->buffer_size;
if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)");
}
/* make the socket non-blocking */
ff_socket_nonblock(udp_fd, 1);
}
if (s->is_connected) {
if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
log_net_error(h, AV_LOG_ERROR, "connect");
goto fail;
}
}
for (i = 0; i < num_include_sources; i++)
av_freep(&include_sources[i]);
for (i = 0; i < num_exclude_sources; i++)
av_freep(&exclude_sources[i]);
s->udp_fd = udp_fd;
return 0;
fail:
if (udp_fd >= 0)
closesocket(udp_fd);
for (i = 0; i < num_include_sources; i++)
av_freep(&include_sources[i]);
for (i = 0; i < num_exclude_sources; i++)
av_freep(&exclude_sources[i]);
return AVERROR(EIO);
}
